Nepean Bay Weather Forecast

    • 13
    • 29

    Sunny

    • 17
    • 29

    Partly cloudy

    • 16
    • 24

    Partly cloudy

    • 13
    • 18

    Cloudy

    • 11
    • 18

    Cloudy

    • 12
    • 20

    Cloudy

    • 13
    • 21

    Mostly sunny

Today 23 Mar Kangaroo Island

Mostly sunny. Winds east to northeasterly 15 to 20 km/h tending northwest to northeasterly in the middle of the day then becoming light in the evening. Daytime maximum temperatures in the high 20s.

Investigator Strait Coastal Waters

Wind
East to southeasterly 10 to 15 knots tending east to northeasterly in the early morning then becoming variable about 10 knots in the middle of the day.
Seas
Below 1 metre.
1st Swell
West to southwesterly below 1 metre.
Weather
Sunny.
Weather Situation
A high pressure system over the Tasman sea, extends a ridge over southern SA. A broad trough moves over SA early in the week, then a cold front clips the southeast and an upper trough moves up over SA Wednesday and Thursday. A new ridge develops south of the Bight mid next week.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Nepean Bay Temperature Statistics View More

March Temperature

Kingscote Airport (7km)

  • Lowest 22 March, 2026

    7 °C

  • Average March

    17.5 °C

  • Highest 10 March, 2026

    31.2 °C

Climate (2021–Present)

Kingscote Airport (7km)

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  • Average Low 2021–2026

    9.2 °C

  • Average 2021–2026

    14.8 °C

  • Average High 2021–2026

    21.1 °C
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